TWI638109B - Solenoid valve device - Google Patents

Abstract

A solenoid valve device includes a solenoid valve, a housing, a cover member, a sealing member, and a grounding member. The solenoid valve includes a spool and a solenoid portion. The solenoid section includes a coil and a magnetic path forming member. The magnetic path forming member forms a magnetic circuit by applying current to the coil. The coil and the magnetic circuit forming member are insulated. The storage case stores a solenoid valve. The cover member closes the opening of the storage case. The sealing member seals the space between the storage case and the cover member. The grounding member is in contact with the magnetic path forming member and protrudes from the inside of the housing case or the cover member to the outside to be grounded. The magnetic circuit forming member has a contact surface. The ground member has a contact portion. An elastic portion is provided on a surface of the contact portion opposite to the contact surface, and the elastic portion is elastically pressed toward the contact surface.

Description

Solenoid valve device

The present invention relates to a solenoid valve device.

Generally speaking, a solenoid valve device forms part of a pilot solenoid valve, which is used to drive hydraulic equipment such as a hydraulic cylinder. The solenoid valve device includes: a solenoid valve; a storage case having one side opened and storing the solenoid valve; a cover member that closes the opening of the storage case; and a sealing member that seals the storage case and the cover member. The solenoid valve causes the pilot pressure of the pilot fluid to act on the end of the main spool (spool valve spool) to move the main spool. The main spool is housed in a valve housing of the main valve section having a plurality of ports.

The solenoid valve includes a valve element that switches a flow path, and a solenoid portion that moves the valve element. The solenoid section includes: a fixed iron core; a movable iron core that is adsorbed to the fixed iron core; and an elastic spring that urges the movable iron core in a direction that moves the movable iron core away from the fixed iron core. In addition, when the coil of the solenoid portion is energized, the movable iron core is attracted toward the fixed iron core against the spring force of the compression spring. As the movable iron core is attracted to the fixed iron core, the valve element moves and the flow path is switched. The fixed core and the movable core each perform a function as a part of a magnetic circuit forming member that forms a magnetic circuit by energizing a coil of a solenoid portion. Generally, the coil and the magnetic circuit forming member are ensured to be insulated.

However, in the solenoid unit configured as described above, when a high voltage exceeding the withstand voltage is applied for some reason, a discharge phenomenon occurs between the coil and the magnetic path forming member, and the coil and the magnetic path forming member are conducted, and May cause insulation damage. Therefore, for example, Japanese Patent Application Laid-Open No. 2008-208914 discloses a device having a grounding member that is in contact with and grounded to the magnetic path forming member. Accordingly, even if insulation breakdown is caused, the coil and the magnetic path forming member are turned on, and a current flows from the coil to the magnetic path forming member, the current flowing from the coil to the magnetic path forming member flows from the magnetic path forming member to the grounding member. As a result, the magnetic circuit forming member is grounded.

However, when insulation damage is caused, it is sometimes difficult for a current flowing from the coil to the magnetic path forming member to flow from the magnetic path forming member to the grounding member. In addition, in a configuration in which the storage case and the cover member are sealed with a gasket, the inside of the storage case is hermetically sealed, so heat generated from the coil of the solenoid portion is not easily released from the inside of the storage case to the outside.

An object of the present invention is to provide a solenoid valve device capable of easily flowing a current flowing from a coil to a magnetic path forming member from a magnetic path forming member to a grounding member when an insulation failure is caused, and a coil from a solenoid portion can be easily caused. The generated heat is released from the inside of the storage case to the outside.

To achieve the above object, a solenoid valve device according to an aspect of the present invention includes a solenoid valve, a housing, a cover member, a sealing member, and a grounding member. The solenoid valve includes a valve element for switching a flow path, and a solenoid portion that moves the valve element. The solenoid unit includes a coil and a magnetic circuit forming member that forms a magnetic circuit by applying current to the coil. The coil is insulated from the magnetic circuit forming member. One side of the storage case is opened and stores the solenoid valve. The cover member closes an opening of the storage case. The sealing member seals the space between the storage case and the cover member. The grounding member is in contact with the magnetic path forming member, and projects from the inside of the housing case or the cover member to the outside to be grounded. The magnetic circuit forming member has a surface to be contacted. The ground member has a contact portion, and the contact portion is formed with a contact surface that is in surface contact with the contacted surface. An elastic portion is provided on a surface of the contact portion opposite to the contact surface, and the elastic portion elastically urges the contact portion toward the contacted surface.

Preferably, the magnetic circuit forming member has a plurality of the contacted surfaces. The ground member has a plurality of contact portions, and the contact portions are formed with contact surfaces that are in surface contact with the contacted surfaces, respectively.

Preferably, the elastic portion is formed integrally with the grounding member.

Preferably, the ground member has a heat transfer portion, and the heat transfer portion is thermally coupled to the cover member or the storage case.

Preferably, the grounding member includes a grounding terminal that protrudes from the inside to the outside of the cover member and is grounded; and a grounding member having the contact portion. The ground terminal includes a ground portion that is in contact with the ground part, and a screw connection portion that is in contact with an embedded screw embedded in the cover member.

Hereinafter, an embodiment in which the solenoid valve device is embodied will be described with reference to FIGS. 1 to 4. The solenoid valve device of this embodiment constitutes a part of a pilot-type solenoid valve, and the pilot-type solenoid valve is used to drive hydraulic equipment such as a hydraulic cylinder in an environment mainly splashed with water and oil.

As shown in FIG. 1, the pilot solenoid valve 10 includes a main valve portion 11 and a solenoid valve device 20. The main valve portion 11 includes a main valve body 13 (spool valve body), and the main valve body 13 is housed in a valve housing 12 having a plurality of ports.

As shown in FIG. 2, the solenoid valve device 20 includes a solenoid valve 21, a storage case 22 that has one surface (upper surface) open and stores the solenoid valve 21, a cover member 23 that closes the opening of the storage case 22, and a seal such as a gasket. A member 24 seals the space between the storage case 22 and the cover member 23. The storage case 22 is preferably a rectangular tube with a bottom. The cover member 23 is preferably a rectangular tube with a cover. The cover member 23 includes a cover portion 23a and a cylindrical portion 23b continuous with a peripheral portion of the cover portion 23a. The sealing member 24 is sandwiched between the end surface on the storage case 22 side in the cylindrical portion 23 b and the end surface on the cover member 23 side in the storage case 22.

The solenoid valve 21 includes a valve body 31 that switches a flow path, and a solenoid portion 32 that moves the valve body 31. The solenoid valve 21 includes a valve body 33 made of a non-magnetic material (made of a synthetic resin material). A supply port 33a, an output port 33b, and a discharge port 33c are formed on one side surface of the bottom side of the storage case 22 in the valve body 33.

A plug 35 is attached to one end portion of the valve body 33 in the longitudinal direction via a sealing portion 34 composed of a gasket and an O-ring, and a valve chamber 36 is formed between the valve body 33 and the plug 35. A supply passage 37 communicating with the supply port 33a is formed in the valve body 33 and the plunger 35, and an output passage 38 communicating with the output port 33b is formed in the valve body 33; and a discharge passage 39 communicating with the discharge port 33c is connected. The supply port 33 a communicates with the inside of the valve chamber 36 through the supply passage 37. The discharge port 33c communicates with the inside of the valve chamber 36 through the discharge passage 39. The output port 33 b communicates with the inside of the valve chamber 36 through the output passage 38.

A valve body 31 is housed in the valve chamber 36. In addition, in the plug 35, a supply valve seat 40 is formed on an end surface facing the inside of the valve chamber 36 and around the opening of the supply passage 37 leading to the valve chamber 36. In the valve body 33, a discharge valve seat 41 is formed on an end surface facing the inside of the valve chamber 36 and around the opening of the discharge passage 39 leading to the valve chamber 36. The valve body 31 can contact and leave with respect to the supply valve seat 40 and can contact and leave with respect to the discharge valve seat 41. A valve body spring 42 is interposed between the valve body 31 and the plunger 35 in the valve chamber 36. The valve body 31 is urged in a direction away from the supply valve seat 40 by the spring force of the valve body spring 42.

A core chamber 43 is recessed on the end surface of the other end portion of the valve body 33 in the longitudinal direction and on the side opposite to the plug 35. In the valve body 33, a magnetic frame 44 is extended from the periphery of the core chamber 43 to a position over the end surface on the side opposite to the plug 35. The magnetic frame 44 is preferably cylindrical. Therefore, the magnetic frame 44 is configured such that a part on the side of the plug 35 is buried in the valve body 33, and a part on the side opposite to the plug 35 protrudes from an end surface of the valve body 33 on the side opposite to the plug 35.

The solenoid portion 32 includes: a fixed iron core 45 fixedly provided inside the magnetic frame 44; a movable iron core 46 accommodated in the iron core chamber 43 and adsorbed by the fixed iron core 45; and a core return spring 47 sandwiched between the fixed Between the iron core 45 and the movable iron core 46. The fixed iron core 45 is preferably cylindrical. The movable iron core 46 is urged toward the valve chamber 36 side by the spring force of the iron core return spring 47. The movable iron core 46 is formed with a valve pressing portion 46 a extending toward the valve body 31. In a state where the movable iron core 46 is urged toward the valve chamber 36 by the iron core return spring 47, the valve element 31 is pressed by the valve pressing portion 46 a and is pressed against the supply valve seat 40. A coil 49 is wound around the fixed core 45 through a resin-made bobbin 48. The fixed core 45 and the coil 49 are insulated through the coil bobbin 48. A gap is provided between the coil 49 and the magnetic frame 44, and the coil 49 and the magnetic frame 44 are ensured to be insulated.

Formed on the bottom of the storage case 22 are a supply path 22a that communicates with the supply port 33a, an output path 22b that communicates with the output port 33b, and a discharge path 22c that communicates with the discharge port 33c.

As shown in FIGS. 2 and 3, a first substrate 51 and a second substrate 52 are housed inside the cover member 23. The first substrate 51 and the second substrate 52 are preferably rectangular plate-shaped. The first substrate 51 is located between the second substrate 52 and the cover portion 23 a of the cover member 23, and is overlapped in a state where they are separated from each other. The length in the short-side direction of the first substrate 51 is longer than the length in the short-side direction of the second substrate 52. The first substrate 51 and the second substrate 52 are electrically connected through a substrate connector 53. The second substrate 52 and the coil 49 are electrically connected through the coil terminal 54. The first substrate 51 is attached to the cover member 23 through a screw 55.

A pair of power receiving terminals 56 are provided on the cover portion 23 a of the cover member 23. One end portion of each power receiving terminal 56 protrudes from the inside of the cover member 23 to the outside, and the other end portion protrudes toward the inside of the cover member 23. A connection terminal 51 a is provided on the first substrate 51, and the connection terminal 51 a is connected to the other end portion of each power receiving terminal 56. In addition, each of the power receiving terminals 56 is connected to the connection terminal 51 a through the other end portion, so that each of the power receiving terminals 56 and the first substrate 51 are electrically connected.

A ground terminal 57 is provided on the cover portion 23 a of the cover member 23. The ground terminal 57 projects from the inside of the cover member 23 to the outside and is grounded. The ground terminal 57 includes: an extension portion 57 a that penetrates the cover portion 23 a of the cover member 23 and protrudes to the outside; and a pair of ground portions 57 b that are continuous with an end portion of the extension portion 57 a that is located inside the cover member 23, And it extends along the inner surface of the cover part 23a of the cover member 23. The ground terminal 57 includes a screw connection portion 57 c that is continuous with an end portion located inside the cover member 23 of the extension portion 57 a and extends to the opposite side of the pair of ground portions 57 b.

An insertion screw 58 is embedded in the cover portion 23 a of the cover member 23 at a position adjacent to the screw connection portion 57 c of the ground terminal 57. The insertion screw 58 includes a cylindrical portion 58a having an internally threaded hole, and an annular flange 58b protruding outward from an outer peripheral surface of the cylindrical portion 58a. A part of the flange 58 b is in contact with the screw connection portion 57 c of the ground terminal 57. In a state in which a connector housing (terminal box) of an external power source (not shown) is connected to the power receiving terminal 56, a mounting screw is locked in the set screw 58, and the mounting screw is used to mount the connector housing to the cover member 23. .

A ground member 60 is attached to the cover member 23. The ground member 60 is preferably U-shaped in cross section, and is formed of a material having good thermal conductivity (for example, copper). The ground member 60 includes a pair of extension pieces 61 and a connection portion 62 that connects ends of the pair of extension pieces 61 to each other. The pair of extension pieces 61 includes a heat transfer portion 61a that is continuous with the connecting portion 62 and extends along the inner surface 231b of the pair of walls in the short side direction of the cylindrical portion 23b of the cover member 23; the contact portion 61b, It extends inside the heat transfer portion 61a in the same direction as the heat transfer portion 61a, and a connection portion 61c that connects the heat transfer portion 61a and the contact portion 61b.

The magnetic frame 44 has a pair of contacted surfaces 44 a, and the pair of contacted surfaces 44 a and the inner surfaces 221 of the pair of walls at the both ends in the short-side direction in the storage case 22 are opposed to each other. The contacted surface 44 a is preferably flat and exposed from the valve body 33. The mutually opposing surfaces of the pair of contact portions 61b form contact surfaces 61d that are in surface contact with the contacted surfaces 44a, respectively. The contact surface 61d is preferably a flat surface. Further, an elastic piece 61f is formed in each contact portion 61b, and the elastic piece 61f protrudes toward the side of the contact portion 61b opposite to the contact surface 61d. The elastic piece 61f is formed by bending a part of the contact portion 61b outward, and the base end portion of the elastic piece 61f is continuous with the contact portion 61b. Therefore, the elastic piece 61f is formed integrally with the ground member 60. In addition, the elastic sheet 61f can be elastically deformed in a direction in which the portion on the front end side of the elastic sheet 61f approaches and leaves the contact portion 61b with the base end portion of the elastic sheet 61f as a base point.

Each heat transfer part 61 a is formed with an elastic piece 61 g protruding to the inside of the cover member 23. The elastic sheet 61g is formed by bending a part of the heat transfer portion 61a inward, and a base end portion of the elastic sheet 61g is continuous with the heat transfer portion 61a. Therefore, the elastic piece 61g is formed integrally with the grounding member 60. In addition, the elastic sheet 61g can be elastically deformed in a direction where the elastic sheet 61g approaches and moves away from the heat transfer portion 61a with the base end portion of the elastic sheet 61g as a base point.

The tip of each elastic piece 61g is in contact with the side surface of the valve body 33, so that the portion of each elastic piece 61g toward the tip side of each elastic piece 61g is elastically deformed in a direction approaching the heat transfer portion 61a. Thereby, each heat transfer part 61a is urged toward the inner surface 231b of the cover member 23, and the state where the outer surface of each heat transfer part 61a and the inner surface 231b of the cover member 23 are in surface contact can be maintained. Therefore, each heat transfer part 61a and the cover member 23 are thermally coupled.

An insertion hole 62 a through which the mounting screw 63 can be inserted is formed in the connection portion 62. The pair of ground portions 57 b of the ground terminal 57 are arranged between the connecting portion 62 and the inner surface of the cover portion 23 a. In addition, the mounting screw 63 passes between the insertion hole 62a and the pair of grounding portions 57b and is locked to the cover portion 23a. Thus, the grounding component 60 is fitted to the cover portion 23a through the pair of grounding portions 57b. 57b contacts, and the grounding component 60 and the ground terminal 57 are electrically connected. The ground member 60 and the ground terminal 57 constitute a ground member 64 that is in contact with the magnetic frame 44 and projects from the cover member 23 to the outside to be grounded.

The first substrate 51 and the second substrate 52 are located between the heat transfer portions 61 a of the pair of extension pieces 61. The length in the short-side direction of the first substrate 51 is longer than the distance between the contact surfaces 61d of the pair of contact portions 61b. The length in the short-side direction of the second substrate 52 is shorter than the distance between the contact surfaces 61d of the pair of contact portions 61b.

The ground member 60 is attached to the cover portion 23 a by the attachment screw 63 before the first substrate 51 is stored inside the cover member 23. Then, the first substrate 51 is inserted from the distal end side of the pair of extension pieces 61 in a state where the portions protruding from the cover member 23 of the pair of extension pieces 61 are elastically deformed in a direction away from each other. The extension sheet 61 passes through, and the first substrate 51 is housed inside the cover member 23 so that the first substrate 51 is disposed between the heat transfer portions 61 a of the pair of extension sheets 61. The second substrate 52 is disposed between the heat transfer portions 61 a of the pair of extension pieces 61, and the first substrate 51 and the second substrate 52 are electrically connected through the substrate connector 53. Therefore, even if the length in the short-side direction of the first substrate 51 is longer than the distance between the contact surfaces 61d of the pair of contact portions 61b, the first substrate 51 can be arranged in the heat transfer portion 61a of the pair of extension pieces 61. between. Therefore, the length in the short-side direction of the first substrate 51 is not shorter than the distance between the contact surfaces 61d of the pair of contact portions 61b, and it is possible to ensure that the mounting surface of the electronic component in the first substrate 51 is as wide as possible.

The pair of contact portions 61 b is inserted between the contacted surface 44 a of the magnetic frame 44 and the inner surface 221 of the storage case 22. In addition, since the distal end of each elastic piece 61f is in contact with the inner surface 221 of the storage case 22, a portion on the distal end side of each elastic piece 61f is elastically deformed in a direction approaching the contact portion 61b. Thereby, each contact part 61b is urged toward each contacted surface 44a, and the state in which the contacted surface 44a and the contact surface 61d are in surface contact can be maintained. Therefore, the elastic piece 61f performs a function as an elastic portion provided on the surface of the contact portion 61b opposite to the contact surface 61d, and urges the contact portion 61b toward the contacted surface 44a.

Next, a continuity check that checks whether the magnetic frame 44 and the ground member 60 are electrically connected will be described.

As shown in FIG. 4, during the continuity check, one of the two continuity inspection tools 65 can be inserted between the storage case 22 and the cover member 23, and the cover member 23 is moved in a direction away from the storage case 22 accordingly. Then, the grounding member 60 also moves integrally with the cover member 23. At this time, the contact between the top end of each elastic piece 61f and the inner surface 221 of the storage case 22 can be maintained, each contact portion 61b is elastically pressed toward each contacted surface 44a, and the contact between the top end of the elastic piece 61f and the inner surface 221 of the storage case 22 The position, the length of the contact portion 61b, and the length of the contact surface 44a are set in advance so that the state where the contact surface 44a and the contact surface 61d are in surface contact can be maintained.

Then, one of the continuity inspection tools 65 is inserted between the housing case 22 and the cover member 23 so as to be in contact with the exposed portion of the magnetic frame 44 that is not buried in the valve body 33. Then, the other continuity check tool 65 is brought into contact with the ground terminal 57. In this continuity check, for example, it is determined whether or not a current flows from one of the continuity check tools 65 to the other of the continuity check tools 65 via the magnetic frame 44, the ground member 60, and the ground terminal 57.

The coil 49 is energized by applying a voltage to the power receiving terminal 56 from an external power source. Thereby, a current is supplied to the coil 49 via the connection terminal 51a, the first substrate 51, the substrate connector 53, the second substrate 52, and the coil terminal 54.

When the coil 49 is energized, the coil 49 is excited, and a magnetic flux passing through the magnetic frame 44, the fixed iron core 45, and the movable iron core 46 is generated around the coil 49. Therefore, the magnetic frame 44, the fixed iron core 45, and the movable iron core 46 are magnetic circuit forming members that form an annular magnetic circuit through which magnetic flux passes. In addition, due to the exciting action of the coil 49, the fixed iron core 45 attracts, the movable iron core 46 is absorbed by the fixed iron core 45 against the spring force of the iron core return spring 47, and the valve core 31 leaves the supply valve due to the spring force of the valve core spring 42. The seat 40 moves in the direction and sits on the discharge valve seat 41. Thereby, the supply passage 37 is opened, and the discharge passage 39 is closed. A part of the air supplied from the air supply source to the main valve portion 11 is supplied to the valve as a pilot fluid via the supply path 22a, the supply port 33a, the supply path 37, the valve chamber 36, the output path 38, the output port 33b, and the output path 22b. The end of the main spool 13 in the housing 12. The main spool 13 is moved toward one end side in the axial direction by the pilot pressure of the pilot fluid. Therefore, the pilot-operated solenoid valve 10 of this embodiment is an internal pilot-operated type.

When the energization of the coil 49 is stopped, the attractive force of the fixed iron core 45 caused by the exciting action of the coil 49 disappears, and the movable iron core 46 moves away from the fixed iron core 45 by the spring force of the iron core return spring 47. Then, through the valve pressing portion 46 a of the movable iron core 46, the valve element 31 is pressed against the spring force of the valve element spring 42 toward the supply valve seat 40 and sits on the supply valve seat 40. Thereby, the supply passage 37 is closed, and the discharge passage 39 is opened. The air supplied as the pilot fluid to the end of the main valve body 13 in the valve housing 12 passes through the output passage 22b, the output port 33b, the output passage 38, the valve chamber 36, the discharge passage 39, the discharge port 33c, and the discharge passage 22c. The main body 13 is moved to the other end side in the axial direction by discharging to the outside from a discharge pipe (not shown).

Next, the operation of this embodiment will be described.

When a high voltage exceeding the withstand voltage is applied to the power receiving terminal 56 from an external power source for some reason, a discharge phenomenon occurs between the coil 49 and the magnetic frame 44 and between the coil 49 and the fixed iron core 45, and the coil 49 and the magnetic frame 44 are turned on. When the coil 49 and the fixed iron core 45 are conducted, it may cause insulation damage. At this time, the contacted surface 44a of the magnetic frame 44 is in surface contact with the contact surface 61d of the ground member 60, so the current flowing from the coil 49 to the magnetic frame 44 and the fixed core 45 flows from the magnetic frame 44 to the ground member 60 and the ground terminal 57 . As a result, the magnetic frame 44 and the fixed iron core 45 are grounded.

In addition, since the contact surface 44a and the contact surface 61d are in surface contact, the heat generated from the coil 49 and transmitted to the magnetic frame 44 is transmitted to the ground terminal 57 via the ground member 60, and is released from the ground terminal 57 to the outside. Further, since the heat transfer portion 61 a and the cover member 23 are thermally coupled, the heat transmitted to the magnetic frame 44 is transmitted to the cover member 23 via the ground member 60 and released from the cover member 23 to the outside. In addition, since the screw connection portion 57 c of the ground terminal 57 is in contact with the flange 58 b of the insertion screw 58, the heat transmitted to the magnetic frame 44 is transmitted to the insertion screw 58 via the ground member 60, and is released from the insertion screw 58 to the outside.

The following effects can be obtained in the above embodiment.

(1) The magnetic frame 44 has a contact surface 44a. The grounding component 60 has a contact portion 61b, and the contact portion 61b is formed with a contact surface 61d that is in surface contact with the contacted surface 44a. An elastic piece 61f that urges the contact portion 61b toward the contacted surface 44a is provided on a surface of the contact portion 61b opposite to the contact surface 61d. Accordingly, the contact portion 61b is elastically pressed toward the contacted surface 44a by the elastic piece 61f, and the state where the contacted surface 44a and the contact surface 61d are in surface contact can be maintained. Therefore, compared with, for example, the case where the contacted surface 44a and the contact portion 61b are in point or line contact, the current flowing from the coil 49 to the magnetic frame 44 and the fixed iron core 45 is more likely to flow from the magnetic frame 44 to the ground when the insulation is broken. Part 60. Further, since the contact surface 44a and the contact surface 61d are in surface contact, the heat transmitted from the coil 49 to the magnetic frame 44 is transmitted to the ground terminal 57 via the ground member 60, and is released to the outside from the ground terminal 57. Therefore, the heat generated from the coil 49 can be easily released from the inside of the storage case 22 to the outside.

(2) The magnetic frame 44 has a plurality of contacted surfaces 44a. The grounding component 60 has a plurality of contact portions 61b, and the contact portions 61b are formed with contact surfaces 61d that are in surface contact with each of the contacted surfaces 44a. According to this, compared with a case where there is only one contacted surface 44a and one contact portion 61b, the contact position of the magnetic frame 44 and the ground member 60 is increased. Therefore, the current flowing from the coil 49 to the magnetic frame 44 and the fixed iron core 45 further easily flows from the magnetic frame 44 to the ground member 60, and the heat transferred from the coil 49 to the magnetic frame 44 is easily transferred to the cover member 23 via the ground member 60.

(3) The elastic piece 61f is formed integrally with the grounding member 60. As a result, the number of parts can be reduced compared to a case where a member that performs a function as an elastic portion that urges the contact portion 61b toward the contacted surface 44a is additionally provided on the surface of the contact portion 61b opposite to the contact surface 61d. , So the structure can be simplified.

(4) The ground member 60 includes a heat transfer portion 61 a that is thermally coupled to the cover member 23. Accordingly, the heat transmitted from the coil 49 to the magnetic frame 44 is transmitted to the cover member 23 via the ground member 60 and is released from the cover member 23 to the outside. Therefore, it is possible to further easily release heat generated from the coil 49 from the inside of the storage case 22 to the outside.

(5) The ground terminal 57 includes a ground portion 57 b that is in contact with the ground member 60, and a screw connection portion 57 c that is in contact with the insertion screw 58. Accordingly, the heat transmitted to the magnetic frame 44 is transmitted to the insert screw 58 via the ground member 60 and released to the outside from the insert screw 58. Therefore, it is possible to further easily release the heat generated from the coil 49 from the inside of the storage case 22 to the outside.

(6) During the continuity inspection, one of the two continuity inspection tools 65 can be inserted between the housing case 22 and the cover member 23 and the cover member 23 is moved in a direction away from the housing case 22 accordingly. Then, the grounding member 60 also moves integrally with the cover member 23. At this time, the contact between the top end of each elastic piece 61f and the inner surface 221 of the storage case 22 can be maintained, each contact portion 61b is elastically pressed toward each contacted surface 44a, and the contact between the top end of the elastic piece 61f and the inner surface 221 of the storage case 22 The position, the length of the contact portion 61b, and the length of the contact surface 44a are set in advance so that the state where the contact surface 44a and the contact surface 61d are in surface contact can be maintained. Therefore, even the solenoid valve device 20 having a configuration in which the solenoid valve 21 is housed in the housing case 22 and closed by the cover member 23 with the sealing member 24 interposed therebetween can be easily checked for continuity.

(7) The space between the storage case 22 and the cover member 23 is sealed by a sealing member 24. Therefore, even if the pilot-operated solenoid valve 10 is used in an environment mainly splashed with water or oil, the solenoid valve 21 is waterproof, so that failure due to moisture such as corrosion of the magnetic frame 44 can be eliminated.

(8) Each heat transfer part 61 a is formed with an elastic piece 61 g protruding to the inside of the cover member 23. As a result, each heat transfer portion 61a is urged toward the inner surface 231b of the cover member 23, and the state where the outer surface of each heat transfer portion 61a and the inner surface 231b of the cover member 23 are in surface contact can be maintained. Therefore, the heat transmitted from the coil 49 to the magnetic frame 44 is easily transmitted to the cover member 23 via the ground member 60.

The above-described embodiment may be modified as follows.

In the embodiment, the outer surface of the heat transfer portion 61 a may not be in contact with the inner surface 231 b of the cover member 23. In short, the ground member 60 may not have the heat transfer portion 61 a thermally coupled to the cover member 23.

In the embodiment, the heat transfer portion 61 a may be in contact with the inner surface of the storage case 22 without being in contact with the cover member 23, and may be thermally coupled to the storage case 22.

・ In the embodiment, a member (for example, a rubber member or a spring member) that performs a function as an elastic portion that urges the contact portion 61b toward the contacted surface 44a may be separately provided on the opposite side of the contact portion 61b from the contact surface 61d. Noodles. In this case, the elastic sheet 61f may or may not be provided.

In the embodiment, the number of the contacted surface 44a and the contact portion 61b may be one, and the number of the contacted surface 44a and the contact portion 61b may be three or more.

・ In the embodiment, the heat transfer portion 61a may not be provided with the elastic sheet 61g.

In the embodiment, a part of the ground member 60 and a part of the cover member 23 may be insert-molded to integrate the ground member 60 and the cover member 23.

In the embodiment, the ground terminal 57 may protrude from the inside of the housing case 22 to the outside and be grounded.

・ In the embodiment, the material of the ground member 60 is not particularly limited.

In the embodiment, the ground member 64 may be formed by integrally forming the ground member 60 and the ground terminal 57.

・ In the embodiment, if the fixed magnetic core 45 and the movable iron core 46 can form a ring-shaped magnetic circuit through which magnetic flux passes, the magnetic frame 44 may be removed. In this case, for example, a contact surface is formed on the fixed iron core 45, and the contact surface 61d of the contact portion 61b in the ground member 60 is brought into surface contact with the contact surface.

In the embodiment, the solenoid valve device 20 constitutes a part of the internally piloted solenoid valve 10, but is not limited to this. For example, it may constitute a part of the externally piloted solenoid valve.

End of 3‧‧‧ section line
10‧‧‧ Pilot Operated Solenoid Valve
11‧‧‧Main Valve Department
12‧‧‧valve housing
13‧‧‧Main spool
20‧‧‧Solenoid valve device
21‧‧‧Solenoid valve
22‧‧‧Storage case
22a‧‧‧Supply Road
22b‧‧‧Output
22c‧‧‧Exhaust
23‧‧‧ cover parts
23a‧‧‧ cover
23b‧‧‧ tube
24‧‧‧Sealing parts
31‧‧‧Spool
32‧‧‧Solenoid Department
33‧‧‧Valve body
33a‧‧‧Supply
33b‧‧‧output
33c‧‧‧Exhaust
34‧‧‧Sealing Department
35‧‧‧plug
36‧‧‧Valve Chamber
37‧‧‧Supply Channel
38‧‧‧output channel
39‧‧‧Exhaust path
40‧‧‧supply valve seat
41‧‧‧Exhaust valve seat
42‧‧‧ spool spring
43‧‧‧ Iron Heart Chamber
44‧‧‧ Magnetic Frame
44a‧‧‧ contact surface
45‧‧‧Fixed iron core
46‧‧‧ Movable iron core
46a‧‧‧valve pressing part
47‧‧‧Core return spring
48‧‧‧ coil bobbin
49‧‧‧coil
51‧‧‧The first substrate
51a‧‧‧connection terminal
52‧‧‧ 2nd substrate
53‧‧‧Substrate connector
54‧‧‧coil terminal
55‧‧‧screw
56‧‧‧Power receiving terminal
57‧‧‧ ground terminal
57a‧‧‧Extended Department
57b‧‧‧ ground
57c‧‧‧Screw connection
58‧‧‧Embedded screws
58a‧‧‧ tube
58b‧‧‧burst
60‧‧‧ Grounding parts
61‧‧‧ Extended
61a‧‧‧Heat transfer department
61b‧‧‧Contact
61c‧‧‧Connection Department
61d‧‧‧contact surface
61f‧‧‧Elastic sheet
61g‧‧‧Elastic sheet
62‧‧‧Connection Department
62a‧‧‧Plug-in hole
63‧‧‧Assembly screws
64‧‧‧ Grounding parts
65‧‧‧Continuity inspection tool
221‧‧‧ (of the storage case 22) inner surface
231b‧‧‧ (of cover member 23) inner surface

FIG. 1 is a cross-sectional view showing a pilot solenoid valve according to the embodiment. Fig. 2 is a sectional view of a solenoid valve device. FIG. 3 is a cross-sectional view taken along the line 3-3 in FIG. 2. FIG. 4 is a cross-sectional view showing a state where a continuity check is performed.

Claims (4)

A solenoid valve device includes a solenoid valve including a valve element for switching a flow path, and a solenoid portion that moves the valve element. The solenoid portion includes a coil and is formed by energizing the coil. The magnetic circuit forming member of the magnetic circuit, the coil and the magnetic circuit forming member are insulated; a storage case, one side of which is open and accommodates the solenoid valve; a cover member, which is connected to the storage case from the opening direction of the storage case Abutting, closing the opening of the storage case; a sealing member that seals between the storage case and the cover member; and a grounding member that is in contact with the magnetic path forming member and from the storage case or The inside of the cover member protrudes to the outside to be grounded, and the solenoid valve device is characterized in that the magnetic path forming member has a contact surface facing the inner surface of the storage container, and the grounding member has a contact portion, The contact portion is formed with a contact surface that is in contact with the surface to be contacted. An elastic portion is provided on a surface of the contact portion opposite to the contact surface, and the elastic portion faces the contacted surface. Face bomb Said contact portion, said urging portion contacts the inner surface of the housing through the housing, and the biasing direction of the contact portion perpendicular to the opening direction of the storage case. A solenoid valve device includes a solenoid valve including a valve element for switching a flow path, and a solenoid portion that moves the valve element. The solenoid portion includes a coil and is formed by energizing the coil. The magnetic circuit forming member of the magnetic circuit, the coil and the magnetic circuit forming member are insulated; a housing case, one side of which is open and houses the solenoid valve; a cover member, which closes the opening of the housing case; The storage case is sealed with the cover member; and a grounding member is in contact with the magnetic path forming member and protrudes from the inside of the storage case or the cover member to the outside, and the solenoid valve device The magnetic circuit forming member has a surface to be contacted, the grounding member has a contact portion, and the contact portion is formed with a contact surface that is in contact with the surface to be contacted. An elastic portion is provided on a surface on the opposite side of the contact surface, the elastic portion urges the contact portion toward the contacted surface, the magnetic path forming member has a plurality of the contacted surfaces, and the grounding member has many A contact portion, the contact portion is formed with a contact surface in contact with the surface contact area, respectively. A solenoid valve device includes a solenoid valve including a valve element for switching a flow path, and a solenoid portion that moves the valve element. The solenoid portion includes a coil and is formed by energizing the coil. The magnetic circuit forming member of the magnetic circuit, the coil and the magnetic circuit forming member are insulated; a housing case, one side of which is open and houses the solenoid valve; a cover member, which closes the opening of the housing case; The storage case is sealed with the cover member; and a grounding member is in contact with the magnetic path forming member and protrudes from the inside of the storage case or the cover member to the outside, and the solenoid valve device The magnetic circuit forming member has a surface to be contacted, the grounding member has a contact portion, and the contact portion is formed with a contact surface that is in contact with the surface to be contacted. An elastic portion is provided on the surface on the opposite side of the contact surface, and the elastic portion urges the contact portion toward the contacted surface. The ground member has a heat transfer portion, and the heat transfer portion and the cover member or All Thermal coupling housing shell. A solenoid valve device includes a solenoid valve including a valve element for switching a flow path, and a solenoid portion that moves the valve element. The solenoid portion includes a coil and is formed by energizing the coil. The magnetic circuit forming member of the magnetic circuit, the coil and the magnetic circuit forming member are insulated; a housing case, one side of which is open and houses the solenoid valve; a cover member, which closes the opening of the housing case; The storage case is sealed with the cover member; and a grounding member is in contact with the magnetic path forming member and protrudes from the inside of the storage case or the cover member to the outside, and the solenoid valve device The magnetic circuit forming member has a surface to be contacted, the grounding member has a contact portion, and the contact portion is formed with a contact surface that is in contact with the surface to be contacted. An elastic portion is provided on a surface on the opposite side of the contact surface, the elastic portion urges the contact portion toward the contacted surface, and the grounding member has a ground terminal that protrudes from the inside to the outside of the cover member. Grounded; and a ground part, which has the contact portion, the ground terminal having: a ground portion, in contact with the ground part; and a screw connection unit, which is fitted with a screw member embedded in the cover in contact.